Rivet-setting machine



Oct 18, 1927.

E. B. STIMPSON RIVET sm'rme mcnm:

Filed Sept 22. 1925 Patented Oct. 18, 1927.

pairs!) STATES PATENT oFFIcs.

EDWIN B. STIMIPSON, OF BROOKLYN, NEW YORK, ASSIGNOR TO EDWIN B. STIMPSON COMPANY, OF BROOKLYN, NEW YORK.

RIVET-SETTING MACHINE.

Application filed September 22, 1925.

the simplification of both the structure and operation of such machines.

The machine 18 particularly adapted to tuftlng cushions, since 1t provides meansfor .compressing the cushion before setting the rivet.

The invention includes a rlvet setting 3 mchanism and a vertically movable anvil member designed to engage the lower end of the rivet. A single means is provided for operating the rivet setting mechanism and for lifting the anvil member.

mechanism.

Other features of the invention will be hereinafter referred to.

In the drawing, in which a preferred embodiment of the invention has been selected for illustration A Fig. 1 is a view in side elevation of a machine embodying the invention.

Fig. 2 is a cross section showing a rivet set i in a cushion.

Referring to the drawing more specifically, the machine includes a. base member from which a vertical standard 11 projects to support a head member 12 on which the feeding A mechanism 13 and rivet setting mechanism 1 1 are carried.

Projecting forwardly from the upper'end of the standard 11 is a guide bracket 15 which guides the vertically movable anvil member 16.

The treadle 17 is pivoted to the standard at 18 and has an angular extension 19. A barr20 is pivoted at one end to extension 19 and at the other end to lever 21, which is the operating lever for the rivet setting mal position and adjustable stops 23 and 24 limit, respectively, the upper and lower movements of the treadle. Adjustable stop 25 mounted on head 12 provides a positive limit for the return movement of lever 21.

Both of these 7 operations are performed through toggle Serial No. 57,812.

Bracket 26 is secured to the standard 11 and carries the bell crank 27 pivoted at 31 111 its outer end and also supports the upper end of spring 22. Lever 28 is pivoted at one end tobell crank 27 and at the other to anvil 16. Lever 29is pivoted at its lower end to the treadle 17 and at its upper end to hell crank 27. 7

Head 30 is adjustably mounted on anvil 16 by means of a screw connection and is secured by a lock nut. A cup 31 is provided in the top of head 30.

The operation of the machine is as follows A cap, shown in section at 82, is placed in the cup 31; The cushion in which the rivet is to be set is placed between the plunger and anvil. As the treadle is pressed the plunger and anvil are moved toward each other, compressing the cushion, and" simultaneously a split rivet, as shown at 33, is forced through the cushion and its split end isspread inside the cap 32. Upon release of the treadle the spring 22 moves the parts to their original positions.

The head 30 can be raised or lowered to set the rivet tight or loose, as desired. 7

It will be noted that upon operation of the treadle the lever 28 is brought into alignment with the axis of the anvil member 16. By this toggle and ram arrangement the anvil is stiffly supported to meet the rivet.

It has been found that for ordinary use the anvil should have a movement of from two to four inches, although any desired amount of movement can be provided.

It is obvious that the machine can be used for setting any suitable type of rivet in any desired material.

I claim: V

In a machine of the kind described, a base. a standard extending vertically upward therefrom, a bracket secured to the front face of said standard and having a hollow cylindrical outer end, an anvil fitting in said outer end and slidable' vertically therein, a second bracket secured to said standard below the first bracket and carrying a pivot pin alined vertically below said anvil, a bell crank lever pivoted at its angle on said pivot pin, one arm of the bell crank lever being movable between vertical and forwardly inclined positions, a link connecting said arm with the lower end of said anvil, a treadle pivoted to said standard, a link connecting the remaining arm of the bell crank with the treadle between its free end and its pivot point, a tension spring connecting the second bracket and treadle and stop members on the standard and base adjustable to limit 10 movement of said treadle.

In testimony whereof I afiix my signature.

EDWVIN B. STIMPSON. 

